{
  "chat_history": [
      {"role":"USER", "message": "What is a species of flightless bird?"},
      {"role":"CHATBOT", "message": "Penguins are flightless."}
  ],
  "message": "Which species is the tallest?",
  "documents":[
    {
      "title": "Tall penguins",
      "snippet": "Emperor penguins are the tallest."
    },
    {
      "title": "Penguin habitats",
      "snippet": "Emperor penguins only live in Antarctica."
    },
    {
      "title": "What are animals?",
      "snippet": "Animals are different from plants."
    }
  ]
}